The cloaca is divided into two parts by a mesenchymal septum called the urorectal
septum divides the cloaca into the rectum and anal canal dorsally, and the bladder and lower urogenital tracts ventrally.
1 It occurs as a result of failure of the descent of the urorectal
septum and the persistence of the cloacal membrane during the development of the tail end of embryo in sixth week of gestation.
17) consideran en base a estudios histologicos que revelan escasa inflamacion con epitelio escamoso en la pared de la fistula, aunado a aparicion usual de las manifestaciones clinicas en la edad neonatal, mas la falta de procesos infecciosos locales; confirman la naturaleza esencialmente congenita del trayecto, lo cual se explicaria por una alteracion en la embriogenesis del tabique urorectal
, el cual en condiciones normales, divide la cloaca en una porcion urogenital ventral y una dorsal debajo de la linea pubococcigea en el embrion.
Rupture of this unduly damage cloacal membrane before the descent of urorectal
septum results in extra cloaca being exposed to exterior.
Rica and colleagues (6) stated that asymmetry in the closure of the urorectal
septum results in an urethraperineal fistula.
This tube is di- vided into rectum and bladder at around 5th weeks of gestation by a caudal proliferation of mesoderm the urorectal
Septation of this by the urorectal
septum and Rathke's folds gives rise to the urogenital sinus (UGS), the cranial part of which gives rise the bladder.
Normally, as a baby grows inside the womb, the bladder and the urinary system separate from the bowel and the gastrointestinal system to form two separate systems by formation a urorectal
By the seventh week, the urorectal
septum has developed, separating the rectum from the urogenital sinus.
Our patient presented with what has been described as partial urorectal
septum malformation sequence (URSM), a condition caused by abnormalities of septation of the primitive cloaca.
Le syndrome urorectal
par incoordination abdomino-levatorienne chez l'enfant.